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N掺杂碳量子点杂化热敏聚合物的刺激响应性及其在溶剂识别和铁离子检测中的应用

Stimulus-Responsiveness of Thermo-Sensitive Polymer Hybridized with N-Doped Carbon Quantum Dots and Its Applications in Solvent Recognition and Fe Ion Detection.

作者信息

Chen Tong, Zhang Hongwei, Zhao Sanping

机构信息

State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan 430073, China.

出版信息

Polymers (Basel). 2022 May 12;14(10):1970. doi: 10.3390/polym14101970.

DOI:10.3390/polym14101970
PMID:35631853
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9147206/
Abstract

To fabricate N-CQDs hybrid thermo-sensitive polymer (poly-N-CQDs), N-doped carbon quantum dots (N-CQDs) with strong blue fluorescence and poly(-isopropylacrylamide--acrylic acid) (poly(NIPAAm--AAc)) copolymer with thermo-sensitivity were synthesized, respectively. Subsequently, the coupling reaction between. the -COOH groups of poly(NIPAAm--AAc) and the -NH groups on the surface of the N-CQDs was carried out. The fluorescence spectra show that the coil-globule transition of the poly-N-CQDs coincided with intensity changes in the scattering peak at excitation wavelength with the temperature variations. The phase transition temperature and the fluorescent intensity of poly-N-CQDs can be regulated by modulating the composition and concentration of poly-N-CQDs as well as the temperature and pH of the local medium. The thermo-sensitivity and fluorescent properties of the poly-N-CQDs displayed good stability and reversibility. The fluorescence intensity and emission wavelengths of the poly-N-CQDs significantly changed in different solvents for solvent recognition. The poly-N-CQDs was employed as a fluorescent probe for Fe detection ranging from 0.025 to 1 mM with a limit of detection (LOD) of 9.49 μM. The hybrid polymer materials have the potential to develop an N-CQDs-based thermo-sensitive device or sensor.

摘要

为了制备N-CQDs杂化热敏聚合物（聚-N-CQDs），分别合成了具有强蓝色荧光的N掺杂碳量子点（N-CQDs）和具有热敏性的聚（N-异丙基丙烯酰胺-丙烯酸）（聚（NIPAAm-AAc））共聚物。随后，进行了聚（NIPAAm-AAc）的-COOH基团与N-CQDs表面的-NH基团之间的偶联反应。荧光光谱表明，聚-N-CQDs的线圈-球状转变与激发波长处散射峰强度随温度变化而变化一致。聚-N-CQDs的相变温度和荧光强度可通过调节聚-N-CQDs的组成和浓度以及局部介质的温度和pH值来调控。聚-N-CQDs的热敏性和荧光特性表现出良好的稳定性和可逆性。聚-N-CQDs的荧光强度和发射波长在不同溶剂中显著变化，可用于溶剂识别。聚-N-CQDs被用作检测0.025至1 mM铁的荧光探针，检测限（LOD）为9.49 μM。这种杂化聚合物材料有潜力开发基于N-CQDs的热敏器件或传感器。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/67a9/9147206/665d6f4e1aa4/polymers-14-01970-g007a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/67a9/9147206/1b68a0d2f31e/polymers-14-01970-sch001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/67a9/9147206/200955862d06/polymers-14-01970-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/67a9/9147206/a53d5d7e81ae/polymers-14-01970-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/67a9/9147206/c328c3240335/polymers-14-01970-g003a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/67a9/9147206/ae43fd241127/polymers-14-01970-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/67a9/9147206/6116a309c51d/polymers-14-01970-sch002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/67a9/9147206/27548f73ebeb/polymers-14-01970-g005a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/67a9/9147206/814f9bb8d812/polymers-14-01970-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/67a9/9147206/665d6f4e1aa4/polymers-14-01970-g007a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/67a9/9147206/1b68a0d2f31e/polymers-14-01970-sch001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/67a9/9147206/200955862d06/polymers-14-01970-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/67a9/9147206/a53d5d7e81ae/polymers-14-01970-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/67a9/9147206/c328c3240335/polymers-14-01970-g003a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/67a9/9147206/ae43fd241127/polymers-14-01970-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/67a9/9147206/6116a309c51d/polymers-14-01970-sch002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/67a9/9147206/27548f73ebeb/polymers-14-01970-g005a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/67a9/9147206/814f9bb8d812/polymers-14-01970-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/67a9/9147206/665d6f4e1aa4/polymers-14-01970-g007a.jpg

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